First straightforward synthesis of 1-hydroxy-3,4-dihydro-1H-benz[g]isochromene-5,10-dione and structure revision of a bioactive benz[g]isochromene-5,10-dione from Psychotria camponutans
作者:Jan Jacobs、Sven Claessens、Norbert De Kimpe
DOI:10.1016/j.tet.2007.10.063
日期:2008.1
For the first time, a synthesis of 1-hydroxy-3,4-dihydro-1H-benz[g]isochromene-5,10-dione (3), which is claimed to be a bioactive compound isolated from Psychotria camponutans, was achieved with a phthalideannulation reaction using 3-cyano-1(3H)-isobenzofuranone (5) and 5,6-dihydropyran-2-one (6) and subsequent reduction of the lactone moiety in the key steps. However, full spectral characterization
首次,1-羟基-3,4-二氢-1的合成ħ -苯并[克]异色烯-5,10-二酮(3),其声称是从分离的生物活性化合物九节属camponutans,是使用3-氰基-1(3 H)-异苯并呋喃酮(5)和5,6-二氢吡喃-2-酮(6)进行邻苯二甲酸酯环化反应,然后在关键步骤中还原内酯部分。但是,合成目标化合物的全光谱表征表明,分离出的化合物不是1-羟基-3,4-二氢-1 H-苯并[ g ]异色烯5,10-二酮(3)。结构修订表明,先前分离出的化合物为已知的Psychorubrin(2)。
Baeyer-Villiger oxidation of naphthaldehydes: easy access to naphthoquinones
作者:Richard W. Franck、Ram B. Gupta
DOI:10.1021/jo00223a041
日期:1985.11
FRANCK, R. W.;GUPTA, RAM, B., J. ORG. CHEM., 1985, 50, N 23, 4632-4635
作者:FRANCK, R. W.、GUPTA, RAM, B.
DOI:——
日期:——
NAITO, TOSHIHIKO;MAKITA, YOSHIHIKO;YAZAKI, SHIOMI;KANEKO, CHIKARA, CHEM. AND PHARM. BULL., 1986, 34, N 4, 1505-1517